[Freeswitch-dev] V8 Performance Tests

[Jan Berger]

My own tests below show that V8 is ca 30% of C if you include compilation,
and 60% if you exclude it. I trust this test more as a brief handrule. .

 

  _____  

From: freeswitch-dev-bounces at lists.freeswitch.org
[mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Michael
Giagnocavo
Sent: 7. juli 2010 16:40
To: freeswitch-dev at lists.freeswitch.org
Subject: Re: [Freeswitch-dev] V8 Performance Tests

 

I don't doubt V8 is great. I'm just saying claiming that it can beat an
optimizing C compiler on anything significant sounds a bit strange :-)

 

-Michael

 

From: freeswitch-dev-bounces at lists.freeswitch.org
[mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Jan Berger
Sent: Sunday, July 04, 2010 2:26 AM
To: freeswitch-dev at lists.freeswitch.org
Subject: Re: [Freeswitch-dev] V8 Performance Tests

 

These tests can be a bit missleading.

 

Anyway - using the benchmark test on V8's own test below: Try running it on
Chrome, and after that you try running it on Opera 10.60

 

The JavaScript in Opera 10.60 gives a higher score in my laptop.

 

 <http://v8.googlecode.com/svn/data/benchmarks/v5/run.html>
http://v8.googlecode.com/svn/data/benchmarks/v5/run.html

 

---

 

V8 is however really good from an implementation point of view. Using is as
a script engine for an app is very straight forward unless you need threaded
apps.

 

V8 is a Multiprocessing by design, but it is not goof on multithreading.

 

Threaded access to V8 is supported, but you need to lock V8 while access
some parts of it (not all) - and it's a bit of work to get this part right.

  _____  

From: freeswitch-dev-bounces at lists.freeswitch.org
[mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Michael
Giagnocavo
Sent: 3. juli 2010 04:59
To: freeswitch-dev at lists.freeswitch.org
Subject: Re: [Freeswitch-dev] V8 Performance Tests

 

http://shootout.alioth.debian.org/u32/benchmark.php?test=all
<http://shootout.alioth.debian.org/u32/benchmark.php?test=all&lang=v8&lang2=
gcc> &lang=v8&lang2=gcc ?

 

From: freeswitch-dev-bounces at lists.freeswitch.org
[mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Jan Berger
Sent: Friday, July 02, 2010 5:45 PM
To: freeswitch-dev at lists.freeswitch.org
Subject: [Freeswitch-dev] V8 Performance Tests

 

Did a quick and dirty performance test comparing C, C++ and V8. This is not
a valid benchmark in any way, it is only a test to give me a feeling about
how "slow" V8 is compared to pure C and C++.

 

The code also executed in the same loop and C/C++ tests was in a separate
function so all 3 tests had exactly the same overhead in the C++ part.

 

C : 1,4 Mill/sec 

C++: 0.8 Mill/sec

V8 Run Only: 0,8 Mill/Sec

V8 Compile+Run: 0,4 Mill/sec

 

Other tests will show other differences - this is just an indication that V8
actually might compare with C/C++ performance wise + their memory handling
look promissing.

 

Threads ? They use globals and statics that will not thread that easy if you
atteempt to thread V8 itself - I need to experiment and see.

 

Jan

 

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